Earlier quoted context omitted.
You cannot tax an asset that does not move. In what intervals would you do this? Your bank account would go to zero.
If the underlying asset is real (not speculative) and it grows, then it is income. So it should be taxed whether you spend it or not. But nobody wants this because we all know it’s pure speculation. That is why we call it “unrealized gains”. If everyone tomorrow tries to cash out their Apple stock, except from the first few, all the rest will get 1 cent each. There is no value in these tickets, just the power of comb…
There is such great risk in that to create self-serving definitions that the industry as a whole decided these terms needed standardization and definition.
Now we already have these standards, so let's just stick with them and all use the same meaning of "income" rather than switching to something based on personal intuition. If you want to change the tax code, change the tax code, don't try to redefine "income".